Zarina Diyas is a Kazakhstani tennis player. Diyas has won five singles titles on the ITF tour. On 12 January 2015, she reached her best singles ranking of world number 31. On 8 June 2015, she peaked at world number 89 in the doubles rankings. Playing for Kazakhstan at the Fed Cup, Diyas has a win-loss record of 8–2.
Diyas played her first professional tournament at a $100K ITF event in Bratislava, losing in the first round of qualifying. She did not play any more tournaments in 2007. In 2008, Diyas played three tournaments, losing in qualifying of the first two events.
She won her first title at a $25K tournament in Astana, where as a wildcard she defeated Tetyana Arefyeva in the final. In 2009, Diyas battled through qualifying and advanced to two quarterfinals in Gifu and Fukuoka. She won her second title beating second seed Katalin Marosi to win another $25K tournament in Stuttgart.
The best result of the year came at a WTA tournament in Prague, where she advanced to the quarterfinals with straight-set wins over Kristina Mladenovic and Petra Kvitová. Diyas went on to lose to Iveta Benešová. In September, she played her first grand slam, losing to Chang Kai-chen of Taiwan in the first round of the US Open Women’s Singles qualifying. She ended her season playing three tournaments in Japan with modest results. In 2010,
she continued to rise up the rankings. Following mixed results for the first half of the year, she reached the final at Rome, losing to Patricia Mayr-Achleitner. Diyas played two more quarterfinals and one semifinal before reaching the quarterfinals of the Premier-level Kremlin Cup in Moscow. She qualified into the main draw and defeated World No. 49 Gisela Dulko in the first round. She then achieved the biggest win of her career by defeating top seed and World No. 7 Jelena Janković in the second round.
However, she lost easily to Maria Kirilenko in the next match. In 2011, Diyas reached the final at Kunming. She then reached the semifinals at Wenshan but did not reach another quarterfinal for the rest of the year.